11221783 has 4 divisors (see below), whose sum is σ = 11583808. Its totient is φ = 10859760.

The previous prime is 11221781. The next prime is 11221789. The reversal of 11221783 is 38712211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38712211 = 31 ⋅1248781.

It is a cyclic number.

It is not a de Polignac number, because 11221783 - 2¹ = 11221781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180966 + ... + 181027.

It is an arithmetic number, because the mean of its divisors is an integer number (2895952).

Almost surely, 2^11221783 is an apocalyptic number.

11221783 is a deficient number, since it is larger than the sum of its proper divisors (362025).

11221783 is an equidigital number, since it uses as much as digits as its factorization.

11221783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362024.

The product of its digits is 672, while the sum is 25.

The square root of 11221783 is about 3349.8929833653. The cubic root of 11221783 is about 223.8827444886.

Adding to 11221783 its reverse (38712211), we get a palindrome (49933994).

The spelling of 11221783 in words is "eleven million, two hundred twenty-one thousand, seven hundred eighty-three".